(1R,2R,3S,4S,5S)-1-(tert-Butyldiphenyl)silyloxymethyl-2,3-dioxy-O,O-isopropylidenebicyclo[3.1.0]hexan-4-ol have been used in the asymmetric synthesis of cyclopropyl-fused 2’-C-methylcarbanucleosides as potential anti-HCV agents.